The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 22, 1977
Filed:
Feb. 14, 1977
Applicant:
Inventor:
Nobuo Yamasita, Tama, JA;
Assignee:
Olympus Optical Co., Ltd., , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350220 ; 350255 ;
Abstract
A retrofocus-type objective for endoscopes comprising a front diverging lens group and rear converging lens group, said rear lens group being divided into a first lens group and second lens group, said retrofocus-type objective being arranged to be focused by varying the airspace between said first and second lens groups. By the above arrangement, the front lens is kept fixed and serves also as a cover glass so that the retrofocus-type objective as a whole becomes small in size.
Yamasita, Nobuo. (1977). Retrofocus-type objective for endoscopes (U.S. Patent No. 4059344). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4059344
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile